I have spent a lot of years doing research on multimedia on Linux, and even helped do some developer work on Gentoo Linux for a while. I've picked up a *lot* of stuff in that time, and this wiki is a personal braindump of everything I can casually throw together.
The main focus of this wiki is on DVDs. I have a lot of them (over a thousand) and I've encountered a lot of quirks and anomalies that come with them.
I highly recommend looking through the multimedia archives of my blog at wonkabar.org to get human-friendly versions of cool stuff. :)
If you have any questions, feel free to ping me and I may be able to help out.